is 125.00 too much to pay for a used southern gas tank for my 89 RS 305? i need to fix that fuel leakage problem i have with over 1/2 tank. last owner messed up filler neck where the cap threads in. its oval like shaped cap threads in but does not seal tight. its becoming a real pita to only put 10 bucks in at a time. i deal with it for now but it needs to be fixed, it drives me nuts.